Embed Notice

@inthehands Firstly, consider what context a *sighted* person would need to know to understand a diagram like this for the very first time. Write accompanying text to facilitate that context. Then describe each tree individually (as separate images) verbatim. The context should not be part of the alt text; that gives more info to folks who read alt text to those who don't, which isn't the intent of alt text.
I'd take inspiration from places like https://en.wikipedia.org/wiki/Binary_expression_tree and https://www.geeksforgeeks.org/expression-tree/.